Ummm....well I'm sure that if you don't mind touching them so much, there's always the obvious thing to do. But I'm assuming that you don't want to do that, so I can't really say, just try to get over it for long enough to let her know what'll happen when she does it. If you can't do that, just try to ignore it, and pretend that it doesn't bother you. And if you can't do that, then get some dirt on them, and show them what it's like.